# RobinX Signals Calls — Caller Performance Rankings on Robinhood Chain

> RobinX Signals Calls — Caller Performance Rankings on Robinhood Chain is a paid API for AI agents from api.robinx.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns ranked leaderboard of X (Twitter) callers graded by early-call accuracy on Robinhood Chain (chain 4663) token launches, based on real on-chain price data.

## Facts

- Endpoint: GET https://api.robinx.io/signals/calls
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/robinx-signals-calls-caller-performance-rankings-on-robinhood-chain-bf8039d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6XSpNM3GuO14jj_M1l7p_

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability robinx-signals-calls-caller-performance-rankings-on-robinhood-chain-bf8039d4
```

Example prompt: Show me the top X callers on Robinhood Chain with at least 5 calls and an early-call rate above 0.8 — I want to see who's actually been right, not just loud.

## When to prefer this

Choose this endpoint when you need an objective, on-chain-grounded ranking of X/Twitter crypto callers specifically on Robinhood Chain (chain 4663) — as opposed to general sentiment tools, follower-count-based influence scores, or multi-chain analytics. It is purpose-built for filtering callers by verified early-call accuracy, not narrative or social proof.

## Known failure modes

- No results returned if min_early_rate or min_calls filters are too strict
- Stale cursor in `since` field causes empty or repeated data
- Chain 4663 indexing lag may mean very recent tweets are not yet graded
- Payment failure via x402 returns 402 with no data
- Invalid query parameter types (e.g. string for integer fields) cause 400 errors

## How this service works

Pollable stream: fresh RH-chain calls by measured early-callers (included fair-use on Agent/Signal Feed keys)

## Output

A paginated JSON array of caller records, each containing the token address called, the caller's X account handle, their total call count, their early-call accuracy rate (0–1), the token symbol, and the timestamp of the tweet — all graded against actual on-chain price movement since Robinhood Chain genesis.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer"
      },
      "since": {
       "type": "string",
       "description": "captured_at cursor from a prior call"
      },
      "min_calls": {
       "type": "integer"
      },
      "min_early_rate": {
       "type": "number"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "data": {
      "calls": [
       {
        "token": "0x45242320dbb855eea8fd36804c6487e10e97fcf9",
        "caller": {
         "calls": 5,
         "early_rate": 0.8
        },
        "symbol": "TENDIES",
        "tg_led": false,
        "account": "example_caller",
        "tweeted_at": "2026-07-20T12:00:00Z"
       }
      ]
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "data": {
  "calls": [
   {
    "token": "0x45242320dbb855eea8fd36804c6487e10e97fcf9",
    "caller": {
     "calls": 5,
     "early_rate": 0.8
    },
    "symbol": "TENDIES",
    "tg_led": false,
    "account": "example_caller",
    "tweeted_at": "2026-07-20T12:00:00Z"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/robinx-signals-calls-caller-performance-rankings-on-robinhood-chain-bf8039d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.robinx.io](https://www.zero.xyz/host/api.robinx.io/llms.txt)